World No 59 Tanvi recovered from a game down to edge out the 18th ranked Gilmour 13-21 21-11 21-17 in a match that lasted for more than an hour.
She is the only Indian in women's singles as top shuttlers Saina Nehwal and P V Sindhu took a break after a hectic Uber Cup campaign.
Young Sourabh Varma also played out of his skin to see off Hong Kong's Nan Wei 19-21 21-14 22-20 and will next face the winner of the match between fourth seed Kenichi Tago of Japan and Korea's Dong Keun Lee.
In women's doubles Commonwealth Games gold-medallists Jwala Gutta and Ashwini Ponnappa defeated Japan's Ayane Kurihara and Naru Shinoya 21-18 21-16 to enter the second round.
Jwala and Ashwini will now be up against sixth-seeded Koreans Kyung Eun Jung and Na Kim.
However, it was a shocking exit for top players Srikanth and Kashyap.
While Germany's Marc Zwiebler avenged his Thomas Cup loss against Srikanth with a 18-21 21-13 21-8 win, Kashyap was done in by world number 116 Riichi Takeshita 21-15 23-25 18-21 in a men's singles match that lasted for one hour and 18 minutes.
Later, RMV Gurusaidutt lost 10-21 21-15 13-21 to Japan's Takuma Ueda after a gruelling battle which lasted more than an hour.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
